I found RB Sassy on the street. I named her after the cat in Homeward Bound. Big mistake, she lived up to the name!
Missy was three months old when I got her from a coworker. I liked the name ok and it seemed to fit her, so I kept it.
Angel came from a rescue and I just kept her name.
Tessa, also from a rescue, was named Contessa, which is really her name, but I call her Tessa.